Internal-combustion engine.



w. .l. TWOMBLY.

-INTERNAL COMBUSTION ENGINE. v APPLICATION FILED JAN. I1. 1913.

1,21 9,607. Patented Mar. 20, 1917.

3SHEETSYSHEET I. o- S v to v n F "3 :8

l l H N: I V

' Fig.1.

WITNESSES:

Winurd Irving momby.

@W TOR/VEV W. l. T'WOMBLY.

INTERNAL COMBUSTION ENGINE.

- APPLICATION FILED JAN. 11, 1913.

Patented Mar. 20, 1917.

3 SHEETS-SHEET 2.

INVENTOR WITNESSES: Mg 1).,

Willarol'lrvlng mommy. f a W @W ATTORNEY.

W. l. TWOIVIBLY.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN. II, 1913.

1,21 9,607 Patented Mar. 20, 1917.

3 SHEETS-SHEET 3- INVENTOH Willard Irving VvomHy;

UNITED STATES PATENT OFFICE.

WILLARD IRVING TWOMBLY, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MEN TS, T0 HENRY W. JESSUP, TRUSTEE, OF NEW YORK, N. Y..-

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Application filed'J'anuary 17, 1913. Serial No. 742,524.

To all whom it may concern:

Be it known that .I, WILLARD IRVING TwoMBLY,I a--citiz'en of the United States, residing in the borough of Manhattan, in the city, c 'anty, and State of New, York, have invented neitiand us *ful Improvements in Internal-Combustion l ln'gines, of which the following is a specification.

This invention relates to internal combustion engines, I and relates particularly to means to air cool the cylinder, and it is the object of the invention to provide means to draw the heated air away from the cylinder and to cause a current of cool air to continu- -.ously circulate over the cylinder or cylinders when the engine is in operation. I

With this object in view I provide the cylinder with longitudinal cooling fins, a

jacket inclosing the head and extending around a portion of thesides of the cylinder and lying contiguous to the cooling fins, said jacket having an opening in the head;

the cylinder fins in conjunction with the jacket forming .air passages communicating with the opening in the cylinder jacket. A vacuum-creating chamber extends around the jacket and communicates with the air passages, a suitable vacuum creating means, such as a rotary fan driven from the crank shaft, being provided to draw air through the opening in the cylinder jacket and away from the cylinder through the vacuum chamber.

A further object relates to the application of the invention to a multiple cylinder engine, and relates particularly to the construction of the jackets of the respective cylinders relative to the vacuum-creating chamber, whereby the suction or drawing of the air from all of the cylinders is equalized, assuring the continuous drawing off of the heated air from all the cylinders.

Further objects and advantages will hereinafter appear. In the drawings accompanying and forming a part of the specification, Figure 1 is a plan'view of'a multiple cylinder engine with an embodiment of my improvements applied thereto.

Fig. 2 is a sectional side elevation, taken substantiallythro'ugh the center of Fig. 1.

Fig. 3 is a sectionalend elevation, partly broken away, taken on the line AA- of Fig. l'look-ing in the direction of the arrow.

Fig. 4 is an enlarged detail view to illustrate the fan. or.vacuum creating driving means; and

Fig. 5is an enlarged sectionaldetail view to illustrate the manner of securing the vacuum chamber in place.

Similiar characters of reference designate like parts throughout the different views of the drawings.

In the embodiment of my invention illustrated in the drawings I have shown the same in connection with a multiple cylinder engine of the two cycle type, comprising three cylinders 6, 7 and 8 fixed to a crank shaft 9, pistons 10 working in the respective cylinders and connected by rods 11 with a crank shaft 13'journaled in the crank case and having a fly wheel 14 fixed to the end thereof.

As a preface to a further. description, I wish to state that while I have shown my invention in connection with a multiple cylinder two cycle engine, it will be obvious that the same may be applied to and operate efiiciently in connection with a single cylinder engine, as well as an engine of the four cycle type.

Each of the cylinders is provided with a series of cooling fins 15 extending longitudi nally of the cylinder and over the head thereof to a laterally projecting boss having internal screw threads for-the insertion of the usual spark plug, and have a laterally projecting annular flange 18, adjacent to the lower ends of the fins 16. The cylinders are "tion of the sides are inclosed by separate and removable jackets 19, preferably of sheet metal, said jackets spaced from the cylinders to form an air chamber and each having an opening 20 in the head thereof.

The jackets lie contiguous to the fins 15 and extend over the sides of the cylinders to a point adjacent the annular flanges 18,

whereby the fins in conjunction with the jackets form or constitute air passages communicating with the openi-n s20 in' the jackets. and having outlets a jacent the flanges'18. It will be noted that the jacket for the cylinder 6 projects down the sides of the cylinder toa greater extent than the j acket for the cylinder 7, and that the jacket for the cylinder 8 does not project down around the sides of the cylinder as far as j the jacket for the cylinder'7. In a single cylinder engine the jacket projects down the sides of the cylinder substantially as shown in' connection with cylinder 6, and the jackets for the diflerent cylinders are made in varying lengths in multiple cylinder engines only and for a purpose to be hereinafter described. A member, designated in a general way 21, extends around the sides of the jackets and cylinders and a portion of the .top and spaced therefrom, said member having a flange portion 22 to rest upon the annular flanges 18 to support the'sameand held down on said flanges by tie rods 23 screw threaded into the flanges 18 and passing through a clamping member 2-1 engaging with the top edge of the member 21 and the top of a cylinder, as clearly shown in Fi s. l and 5, and se'curedby a nut 25 engaglng with the end of the rod 23.' This member 21 constitutes a chamber extending around the jackets and cylinders with which the air fl passages communicate. the said member flaring outward at one end I and having a circular opening26, as shown in Figs. 1 and 3. I I 4 This chamberis in the nature of a vacuum-creating chamber in vacuum is created by a rotary fan journaled by means of ball bearings on a stud 27 fixed-in the side of the cylinder 6 central of the circular opening of the chamber 21.

This fan comprisesa pair of annulan members 28, 29 connected by a series of circumferentially'disposed vanes or blades 30, the

member 29' having a hub portion, as 31,-

wheel and in an annular iecess 36 inla pro-- jecting portion of the fan hub 31. To compensate for any slack in said belt I provide a weighted roller. 27 adapted -to.-engage with the belt, said roller rotatably carried by an arm 38 pivotally supported on a bracket 39 fixed to the framework, the bracket being so located that the roller 37 by its own weight will'be caused to engage with and take up any slack in the belt 35.

The operation of my improved cooling which ameans is substantially as follows: As the --engine is started rotary motion will be imparted to the fan by the crank shaft through the belt 35, said fan drawing the air out of the chamber 21 creating a partial vacuum therein and sucking or drawing air in vthrough the jacket openings 20 and the air passages between said jackets and the fins I 1 6 and 7, and as the outlets in connection' with the. cylinder 8 are the greatest the suction will be greater,-and as the air is drawn through the flaring portion of the chamber 21 it'will create a sucking action and draw the air from the air chambers of cylinders 6 and 7.

Variations may be'resorted to within the scope of my invention.

Having thus described my invention, I claim: I

1. In an internal combustion engine, the combination of a plurality of cylinders; jackets to inclose-the heads and a portion of the sides of thecylinders, each jacket having an opening in the head end thereof; a member extending around the jackets to form a chamber-around said' jackets with -Which all of the jackets communicate at their inner ends, said chamber flaring gradually from one end to the other end and having an opening in such flaring end; and means to draw the air through the jacket openings away from the cylinders and out through said flaring opening, each of the jackets of the plurality of cylinders being of difi'erent extent with relation to the other parts whereby the cooling effect varies progressively in the order of the cylinders from one end to the other.

2. In an internal combustion engine, the combination of a plurality of cylinders having longitudinally extending cooling fins and a flange adjacent the ends of the fins; jacketsto inclose the heads and a portion of the sides of the cylinders to a point adjacent the flanges, each jacket having an opening in the head end thereof, the fins in conjunction w1th the ackets forming air passages communicating with the openings in the head ends of the jackets, and the jacket for the-cylinder at one end extending around the sides of the cylinder for agreater distance than-the jacket of the succeeding cylinder; a member extending around the jackets to constitute a chamber'extending aroundj communicate and saidchamber flaring g-rad-' ually from the end adjacent the shortest cylinder jacket to the longest cylinder acket and having an opening in said flaring end at the end adjacent the longest cylinder jacket and a rotary fan operating in the.

combination of a plurality of cylinders having laterally projecting flanges; jackets in' closing theheads and a portion of the sides of the cylinder and. spaced therefrom, each jacket having an opening in the head end thereof; a member to extend around all of the jackets and held in fixed relation to the cylinders, said member and flanges constituting a chamber extending around the jackets and with which the jackets communicate, and flaring outward from one end to the opposite end with an opening in the flaring end, a stud held in fixed relation-with 3. In an internal combustion engine, the

combination of a plurality of cylinders have ing laterally projecting flanges; jackets inclosing the heads anda portion of the sides of the cylinders and spaced therefrom, each jacket having an opening in the head thereof; a member to extend around the jackets and resting upon the cylinder flanges, said member and the flanges constituting a chamber extending around the jackets with which the jackets communicate at their ends, and having an enlarged flaring circular opening at one end; a rotary fan driven from the crank shaft adjacent the circular opening of the chamber to draw the air from thecylinder jackets through said chamber, said fan comprising a pair of annular members connected byblades or vanes, one of the annular members having an opening to register with the circular opening in the chamber, and the other member having a hub portion whereby the fan is mounted on the piston-stud; packing extending around the annular opening-in the chamber and abut-- the cylinder adjacent the open end of thefting' against" the fan flange to form an' air chamber; a rotary fan driven from the crank shaft mounted on said stud within the flaring opening of the chamber to draw air through the jacket openings and away from the cylinders through said chamber; and means to maintain a substantially air tight joint between said fan and the flaring opening, substantially as and for the purpose specified.

4. In an internal combustion engine, the combination of a plurality of cylinders having laterally projecting flanges; jackets inclosing the heads and a portion of the sides of the cylinders and spaced therefrom, each jacket having an opening in the head end thereof; a member to extend around the jackets and resting upon the cylinder flanges, said member and the flanges constituting a chamber extending around the jackets with which the latter communicate, and. having a circular opening at one end, said chamber gradually flaring from one end to the open' chamber,- substantially as and for the purpose specified.

5. In an internal combustion engine, the

position, substantially as and for the pur pose specified.

. 6.'In-an internal combustion engine, the combination of a plurality of cylinders, jackets inclosing the upper portion of said cylinders and spaced therefrom, said jackets respectively extending a greater distance from the top of the cylinder downward on each successive cylinder, each jacket having an upper opening, a member extending around the ackets and a closure between said member and the cylinder below said jackets, said. member forming achamber around the jackets and with which the jackets communicate at one end, and having an increasing transverse sectional area from one end to the other, means for moving air through said chamber associated with the large end of said chamber, for the purpose described.

Witnesses:

' LAURA E. SMITH,

P. PmLII-r.

jtig'ht connection between said flange and 

